¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io

333P 40' from Mizar


 

Right now Dec.6d 4h UT comet 333P/LINEAR (mag9.6 says aerith.net) is just 40' from Mizar

Trying to get a photo of it from Ireland but pesky clouds drifting in!

Over to you guys!


 

David, it was cloudy last night here in the desert and with 333P moving almost 10'/hour across our skies I wonder if Mizar would have still been in my comet FOV by the time it rose in the desert. 333P on the morning of 2024 December 5 0935UT was magnitude G=10.7 as calculated from 4x10 second images taken thru a green filter in an aperture diameter of 2.4'. The comet has brightened 0.5 magnitudes in the last 4 days so it may reach magnitude 10 by December 9 when it makes its close approach to Earth at about 80.8 million kilometers. The comet was 83.6 million kilometers from Earth when these images were collected.


 

Hi Mike,, yes, after I sent the post I looked at path in SKYMAP and I realised 333P is moving at 4 degrees per day!
So only those who read my message immediately would have stood a chance.
I only got 1 frame (2- seconds exposure on my C11 @ f/4.7) with a Canon DSLR at ISO25,600 which I only used for centering comets before longer exposures.?
It's got Mizar and Alcor at one end of the frame and the comet as a tiny smudge with a bit of tail like your shot has but it not worth publishing - think it was a 2-second exposure.?
Then clouds rolled in!
It was just dumb-luck that I spotted it :)
David
Editor,Astronomy Ireland magazine


On Friday 6 December 2024 at 20:27:42 GMT, Mike Olason via groups.io <molason@...> wrote:


David, it was cloudy last night here in the desert and with 333P moving almost 10'/hour across our skies I wonder if Mizar would have still been in my comet FOV by the time it rose in the desert. 333P on the morning of 2024 December 5 0935UT was magnitude G=10.7 as calculated from 4x10 second images taken thru a green filter in an aperture diameter of 2.4'. The comet has brightened 0.5 magnitudes in the last 4 days so it may reach magnitude 10 by December 9 when it makes its close approach to Earth at about 80.8 million kilometers. The comet was 83.6 million kilometers from Earth when these images were collected.